ABSTRACT
Numerous configurations with a wide range of choice of materials have been investigated and developed for perovskite solar cells (PSC) with success and promising appearance in the mass production line shortly. The new generation of PSCs can be categorized into some main groups. Planar heterojunction PSC can have a conventional n-i-p or an inverted p-i-n architecture. The mesoscopic PSC which contains a layer of nanostructured materials—active or passive—to act as scaffold supporting the perovskite layer and the planar solar cell configuration which consists of a thin layer of perovskite is sandwiched between two selective contacts. The mesoscopic PSC configuration consists of a nanostructured material which acts as a scaffold for the deposition of the perovskite. Many metal oxide nanostructures have been studied as the active scaffold for mesoscopic PSCs but the mesoporous TiO2 nanoparticles network similar to the photoanode of dye-sensitized solar cell is by far the most commonly used material.
